Differential movement and activity patterns of sexes in a biparental beetle during the reproductive season

Johanna Kiss; Zoltán Németh; András Kosztolányi; Zoltán Barta

doi:10.1111/een.12920

Thermal physiology and activity in relation to reproductive status and sex in a free-ranging semelparous marsupial

Conservation Physiology ◽

10.1093/conphys/coz073 ◽

2019 ◽

Vol 7 (1) ◽

Cited By ~ 1

Author(s):

Cassandra A Parker ◽

Fritz Geiser ◽

Clare Stawski

Keyword(s):

Activity Patterns ◽

Reproductive Season ◽

Reproductive Status ◽

Water Shortages ◽

Mating Period ◽

Physiological Adaptations ◽

Lactating Females ◽

Energetic Constraints ◽

Reproductive Females ◽

Free Ranging

Abstract In a changing climate, southern hemisphere mammals are predicted to face rising temperatures and aridity, resulting in food and water shortages, which may further challenge already constrained energetic demands. Especially semelparous mammals may be threatened because survival of the entire population depends on the success of a single breeding event. One of these species, the yellow-footed antechinus, Antechinus flavipes, a small, heterothermic marsupial mammal, commences reproduction during winter, when insect prey is limited and energetic constraints are high. We examined the inter-relations between thermal and foraging biology of free-ranging A. flavipes and examined whether they use torpor for energy conservation, despite the fact that reproduction and torpor are considered to be incompatible for many mammals. Females used torpor during the reproductive season, but patterns changed with reproductive status. Prior to breeding, females used frequent (86% of days), deep and long torpor that was more pronounced than any other reproductive group, including pre-mating males (64% of days). Pregnant females continued to use torpor, albeit torpor was less frequent (28% of days) and significantly shorter and shallower than before breeding. Parturient and lactating females did not express torpor. During the mating period, males reduced torpor use (24% of days). Pre-reproductive females and pre-mating males were the least active and may use torpor to minimize predator exposure and enhance fat deposition in anticipation of the energetic demands associated with impending mating, gestation and lactation. Reproductive females were most active and likely foraged and fed to promote growth and development of young. Our data show that A. flavipes are balancing energetic demands during the reproductive season by modifying torpor and activity patterns. As the timing of reproduction is fixed for this genus, it is probable that climate change will render these behavioural and physiological adaptations as inadequate and threaten this and other semelparous species.

Download Full-text

Predicting spatial activity patterns in a neural map from a probabilistic atlas of 3-D reconstructed neurons

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100140439 ◽

1995 ◽

Vol 53 ◽

pp. 812-813

Author(s):

G. Jacobs ◽

F. Theunissen

Keyword(s):

Activity Patterns ◽

Three Dimensional ◽

Sensory System ◽

Neural System ◽

Probabilistic Atlas ◽

Uniform Sample ◽

Dimensional Reconstruction ◽

The Time Domain ◽

And Function ◽

Visualization Techniques

In order to understand how the algorithms underlying neural computation are implemented within any neural system, it is necessary to understand details of the anatomy, physiology and global organization of the neurons from which the system is constructed. Information is represented in neural systems by patterns of activity that vary in both their spatial extent and in the time domain. One of the great challenges to microscopists is to devise methods for imaging these patterns of activity and to correlate them with the underlying neuroanatomy and physiology. We have addressed this problem by using a combination of three dimensional reconstruction techniques, quantitative analysis and computer visualization techniques to build a probabilistic atlas of a neural map in an insect sensory system. The principal goal of this study was to derive a quantitative representation of the map, based on a uniform sample of afferents that was of sufficient size to allow statistically meaningful analyses of the relationships between structure and function.

Download Full-text

Inducing Unconscious Stress

Journal of Psychophysiology ◽

10.1027/0269-8803/a000247 ◽

2020 ◽

Vol 34 (3) ◽

pp. 192-201

Author(s):

Melanie M. van der Ploeg ◽

Jos F. Brosschot ◽

Markus Quirin ◽

Richard D. Lane ◽

Bart Verkuil

Keyword(s):

Repeated Measures ◽

Activity Patterns ◽

Physiological Changes ◽

Implicit Measures ◽

Prime Word ◽

Student Sample ◽

Priming Task ◽

Subject Design ◽

The Relationship ◽

Stress And Health

Abstract. Stress-related stimuli may be presented outside of awareness and may ultimately influence health by causing repetitive increases in physiological parameters, such as blood pressure (BP). In this study, we aimed to corroborate previous studies that demonstrated BP effects of subliminally presented stress-related stimuli. This would add evidence to the hypothesis that unconscious manifestations of stress can affect somatic health. Additionally, we suggest that these findings may be extended by measuring affective changes relating to these physiological changes, using measures for self-reported and implicit positive and negative affectivity. Using a repeated measures between-subject design, we presented either the prime word “angry” ( n = 26) or “relax” ( n = 28) subliminally (17 ms) for 100 trials to a student sample and measured systolic and diastolic BP, heart rate (HR), and affect. The “angry” prime, compared to the “relax” prime, did not affect any of the outcome variables. During the priming task, a higher level of implicit negative affect (INA) was associated with a lower systolic BP and diastolic BP. No association was found with HR. Self-reported affect and implicit positive affect were not related to the cardiovascular (CV) activity. In sum, anger and relax primes elicited similar CV activity patterns, but implicit measures of affect may provide a new method to examine the relationship between (unconscious) stress and health.

Download Full-text